Make publication of external activities backwards compatible
Make publication of external activities backwards compatible

[#72440358]

Handle 'is_required' attribute correctly when it's not provided.
Previously we were trying to set NULL when incoming hash didn't
contain it, but DB has non-null constraint on this column.

concord-consortium/rigse,concord-consortium/rigse,concord-consortium/rigse,concord-consortium/rigse,concord-consortium/rigse,concord-consortium/rigse